Hello! I am going to install MacOS on an External SSD and I need some advice. Should I install it normally with APFS? OR Try to install it with HFS? The reason why I am debating over this is because I have heard of APFS having issues like data loss, performance issues, or the fact that it's case-sensitive(?) which broke some apps. Currently I am using an iMac with a hard drive that suffers from freezing up or just being very slow. So I thought that this was the best option because I am afraid of breaking my computer if I open it up. Also....Any tips on the subject would be appreciated EDIT: I decided to use APFS because it was easier to setup and here's my review! SSD: Samsung T5 Setup: iMac 2012 Performance: PROs: Everything from the computer boot time, application load time, and file transfers are significantly faster. The computer is also silent now which makes a difference! +Game Install/Download was several times faster on the SSD CONs: If you were planning on playing games on it like I was then you'll likely notice the input lag (delay). At first I couldn't tell that it was there but after extended use I noticed that doing simple tasks such as bring up the dock (w/ automatic show & hide setting) would have an input delay that didn't exist on my internal HDD. Another issue is the mouse performance, I am using the Razer Deathadder 2013 and I installed the Synapse drivers (all the restarts and config prompts were done correctly) and yet I still noticed that the performance was worse when compared with the internal HDD. Conclusion: Overall it seems like an easy decision for anyone who doesn't play any games on their computer because everything else runs so much better than a traditional HDD! If possible I would recommend installing an SSD internally which I was not brave enough to do. Input Lag (delay) Mouse tracking problems If I find a solution to the problem I will come back to this thread. If you have any questions feel free to PM me and I'll try to give you some advice.